Sonenclar - who was runner-up in The X Factor USA's second season - recently told Life & Style magazine that she is confident Cowell will be a capable father.

"I think he's going to be a good dad - I really do," she said.

The 14-year-old added: "The thing with him, is even us - we're his contestants, we're not his children, obviously - but he treated us... he wanted to push us to do our best, and he did. I think that's what he'll do for his child."